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X-ray Astronomy Field Guide: Groups & Clusters of Galaxies
Chandra Images by Category: Groups & Clusters of Galaxies

-Vast clouds of hot gas embedded with numerous galaxies.

18 Dec 14
A galaxy cluster located about 9.6 billion light years from Earth
27 Oct 14
A galaxy cluster about 250 million light years away.
27 Oct 14
A galaxy cluster about 50 million light years away.
24 Jun 14
A giant collection of galaxies immersed in hot gas about 250 million light years from Earth.
03 Apr 14
A galaxy cluster nicknamed "El Gordo" about 7 billion light years from Earth.
04 Mar 14
Galaxy ESO 137-001 plunges through the Norma galaxy cluster.
23 Jan 14
The black hole is in a galaxy cluster located about 3.9 billion light years from Earth.
08 Jan 14
A bright, long duration flare may be the first recorded event of a black hole destroying a star in a dwarf galaxy.
19 Sep 13
A collection of thousands of galaxies about 320 million light years from Earth.
18 Dec 12
A galaxy cluster about 1.3 billion light years from Earth with a large elliptical galaxy in its center.
18 Dec 12
A galaxy cluster about 1.89 billion light years from Earth.
15 Aug 12
A galaxy cluster, whose official name is SPT-CLJ2344-4243, located about 5.7 billion light years from Earth.
12 Apr 12
A merger of galaxy clusters about 5.2 billion light years from Earth.
14 Mar 12
A cluster of galaxies located about 2.3 billion light years from Earth.
02 Mar 12
A collision of massive galaxy clusters located about 2.4 billion light years from Earth.
10 Jan 12
A galaxy cluster located about 7 billion light years from Earth.
13 Dec 11
A cluster of galaxies located about 480 million light years from Earth.
22 Jun 11
A collision of galaxy clusters about 3.5 billion light years away.
12 Jan 11
A burgeoning galactic metropolis, the most distant known in the early universe.
20 Dec 10
A galaxy 920 million light years away from Earth.
08 Dec 10
The central elliptical galaxy in a group located about 105 million light years from Earth.
26 Oct 10
A galaxy cluster with a central quasar located about 8 billion light years away.
30 Aug 10
A composite image of the northern part of Abell 1758, located about 3.2 billion light years from Earth.
18 Aug 10
A massive galaxy about 50 million light years away in the Virgo Cluster.
14 Apr 10
A cluster of galaxies about 614 million light years from Earth.
21 Jan 10
A galaxy plunging into the cluster Abell 3627 about 230 million light years away.
22 Oct 09
A galaxy cluster located about 10.2 billion light years from Earth.
14 Sep 09
A galaxy cluster about 840 million light years from Earth.
09 Jul 09
A group of galaxies that is located about 280 million light years from Earth.
28 May 09
A supermassive black hole in a distant galaxy, about 10 billion light years away.
16 Apr 09
One of the most complex galaxy clusters, located about 5.4 billion light years from Earth.
11 Mar 09
A galaxy lies about 110 million light years away
16 Dec 08
A galaxy cluster located about 740 million light years from Earth.
30 Oct 08
A collision of two large clusters of galaxies about 3.8 billion light years away.
15 Oct 08
This composite image shows Abell 521, located about 2.9 billion light years from Earth.
11 Sep 08
A massive cluster of galaxies located about 2.3 billion light years away.
27 Aug 08
A powerful collision of two galaxy clusters about 5.6 billion light years away.
20 Aug 08
The central region of a rich galaxy cluster about 250 million light years from Earth.
05 Aug 08
The largest galaxy in the Virgo cluster of galaxies at a distance of 60 million light years away.
04 Feb 08
An elliptical galaxy at a distance of about 300 million light years.
20 Sep 07
A giant cluster of galaxies about 220 million light years from Earth with galaxy ESO 137-001 plunging into it.
16 Aug 07
A system where at least two massive galaxy clusters have collided.
06 Aug 07
A four-way collision of galaxies about 5 billion light years away.
24 Jul 07
Two clusters of galaxies about 5.7 billion light years from Earth.
24 Jul 07
Two clusters of galaxies about 5.7 billion light years from Earth.
30 May 07
Evidence for an awesome upheaval in a massive galaxy cluster was discovered in a Chandra image.
02 Nov 06
A galaxy cluster located about 2.6 billion light years away in the constellation of Camelopardus.
05 Oct 06
An elliptical galaxy known in the Virgo cluster about 50 million light years away.
21 Aug 06
Site of a collision between two large galaxy clusters about 3.4 billion light years from Earth.
08 Aug 06
A galaxy cluster about 4.5 billion light years away.
08 Aug 06
A galaxy cluster about 2.2 billion light years away.
08 Aug 06
A galaxy cluster about 2.6 billion light years away.
08 Aug 06
A galaxy cluster about 3.5 billion light years away.
08 Aug 06
A galaxy cluster about 2.1 billion light years away.
08 Aug 06
A galaxy cluster about 1.4 billion light years away.
06 Apr 06
A galaxy cluster with a central galaxy, NGC 1128, that has produced a giant double radio source known as 3C 75.
01 Dec 05
The central region of a rich galaxy cluster about 250 million light years from Earth.
08 Apr 05
Distant galaxy clusters compared with counterparts that are relatively close by.
25 Jan 05
A starburst galaxy located in galaxy cluster Abell 1367, about 300 million light years away.
05 Jan 05
A cluster of galaxies 2.6 billion light years from Earth.
29 Oct 04
A galaxy in the constellation of Virgo.
08 Sep 04
A nearby galaxy cluster about 65 million light years from Earth.
13 Aug 04
A massive galaxy cluster about 3 billion light years from Earth.
18 May 04
A galaxy cluster 1 billion light years away.
18 May 04
A galaxy cluster 3.5 billion light years away.
18 May 04
A galaxy cluster 6.7 billion light years away.
10 May 04
Long-exposure image of the giant elliptical galaxy M87.
06 Jan 04
A galaxy being ripped apart as it races at 4.5 million miles per hour.
02 Jan 04
A color composite image shows the X-ray light from 70-million-degree Celsius gas in the cluster.
03 Sep 03
Two galaxies in the Virgo galaxy cluster that are more than 100,000 light years apart.
01 Sep 03
A 53-hour Chandra observation of the central region of the Perseus galaxy cluster.
11 Jun 03
Galaxy cluster Abell 2029 is approximately one billion light years from Earth.
21 May 03
One of two massive galaxies that are enveloped by vast clouds of high-energy particles.
21 May 03
One of two massive galaxies that are enveloped by vast clouds of high-energy particles.
08 May 03
A compact group of galaxies about 280 million light years from Earth.
13 Sep 02
A galaxy cluster in the constellation Serpens.
04 Apr 02
A cluster of galaxies about 500 million light years from Earth in the constellation Coma Berenices.
20 Feb 02
An extremely hot galaxy cluster about 4 billion light years from Earth.
29 Jan 02
A cluster of galaxies about 170 million light years from Earth, located in the constellation Centaurus.
08 Jan 02
A cluster of galaxies about a billion light years from Earth, located in the constellation Aquarius.
06 Sep 01
A galaxy cluster located 3.1 billion light years from Earth.
06 Sep 01
A galaxy cluster located 2.5 billion light years from Earth.
06 Sep 01
A cluster of galaxies 4 billion light years distant in the constellation Draco.
05 Mar 01
A new Chandra image shows remarkable detail and complexity in the central region of a compact galaxy.
15 Feb 01
A cluster of galaxies some 10 billion light years from Earth.
04 Dec 00
A cluster of galaxies with a prominent 'cooling flow'.
01 Jun 00
Features revealed in the core of the galaxy cluster.
01 Mar 00
A cluster of galaxies in the constellation Corona Borealis.
09 Dec 99
A cluster of galaxies in the constellation Hydra.
16 Nov 99
A large galaxy in the center of a cluster of galaxies located in the constellation Bo÷tes.